Method of treating commercial gasoline for internal-combustion engines to remove andprevent the formation of carbon



Pmae Mu. 4,1930

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IE'I'HOD OI'TBEAT ING GASOLINE FOB, INTERNAL-COMBUSTION This inventionrelates to a method of treat-- in commercial gasoline as a fuel for inter- 1 a na combustion en es to prevent the formation of carbon. 7 5 It is well-known, that the. combustion of this commercial gasoline leaves more or less carbon deposit on the walls ,of the combustion chamber including thepiston and valves due to imperfect or premature combustion.

10 This accumulation of carbon solidifies in a coating of greater or less thickness which, asidefrom its tendency to incandescence or excessive heat-retention under continued operation of the engine, is a direct cause of motor troubles such as reduced power and conse uent carbon knocks and waste of fuel.

e main object of thepresent invention is to treat-the gasoline in such mannenthat it will effectively remove previo 1y formed no carbon and preventthe formation of new.

carbon and at the same time will increase thecombustibility of the fuel mixture by retarding the explosion sufliciently to allow complete combustion without in any way altering or adding to the present motor equipment.

In other words, I have sought to introduce into the commercial gasoline a relatively small ercentage of some other agent which is rea il miscible with the gasoline and which, w en introduced with the combustible fuel mixture into cylinders of the engine, will not only disintegrate and remove any previou'sl formed carbon but will also prevent the ormation of new carbon as a result of the combustionwithout in any way injurmg any of the parts through which or-mto which the mixture is introduced in transit .from the source of supply to the exhaust.

' After many and repeated experiments I have discovered that a relativelysmall quantity of hydro-hydrocarbons produced by diroot or indirect hydrogenation of the hydro-.

carbonsof the carboc clic series is instantly miscible with a relatively large quantity of gasoline and that this mixture not only increases the combustibility of the fuel for the reasons stated but also attacks, disintegrates and removes any previously formed carbon and prevents the formation of new carbon power, during which the relativel ENGINES TO REMOVE AND PREVENT THETORMATION OI CARBON 7 Application fled December M, 1025. Serial m; 77,596.-

thereby reducing to a minimum, the liability which means greater smoothness of operation, more power, greater speed and more mileage per gallon, and also reduces the fuel consumption.

of what is commonly known as carbon knocks,

In these experiments I have. found that" approximately one ounce of tetra-hydro naphthalene'of the hydrogenated carbocyclic series to five gallons of commercial gasoline or a proximatel two-tenths (.2) parts of tetra ydronapht alene to approximately one hundred (100-) parts of'gasoline is highly. eflicient in carr ingv out the objects of the. invention, and t at these proportions may be varied accordin to'the gravity of the aso-- line without re ucing t e efiiciency 0 the combustible mixture.

In practicing. this invention the tetra-hydronaphthalene or its equivalent of the hydrogenated carbocycl-ic series is simply introduced into the gasoline in the mam supply tank with which the motor vehicles are usually equipped at normal atmospheric temper ature and without further treatment of the "mixture after said' introduction to act as an agent in preventing the formation of carbon.

This preventative agent when introduced into the gasoline in about the proportions named instantly mixes with the gasoline, which acts as a conveyer therefor so that the liquid mixture may readily be drawn into the combustion chambers of the engine in the usual manner for'i'gnition and combustion and the conversion of the combustion into small quantity of hydrogenated carbocyc ic compound attacks, disintegrates and removes any carbon which may have been previously formed'and increases the combustion of the mixture to such an extent as to prevent the precipitation of additional carbon upon the walls of the combustion chamber and other parts of the engine exposed thereto.

What I claim is: I

l. The herein described method of treating commercial gasoline for internal combustion engines to remove and prevent'the formation of carbon consisting in introducing a relatively small percentage by weight of i '2 i r y I 1,749,244

tetrahydronaphthalene' of the hydrogenated .carbocyclic series into a relatively large quan-e tity by weight of commercial gasoline at normal atmospheric temperatures and without 5 any alteration of the gasoline previous to the introduction of the tetrahydronaphthalene. 2. The herein described method of treating. commercial gasoline for internal combustion engines to remove and prevent the formation of carbon consisting in introducing a modifying agent consisting only of approximately two-tenths parts of tetrahydronaphthalene :into approximately one-hundred parts of commercial gasoline at normal at- 15 mospheric temperatures and without any a1- teration of the gasoline previous to the introduction of the tetrahydronaphthalenel 3. The herein described method of treating commercial gasoline for internal comg bustion engines to remove and prevent the formation of carbon consisting in introducing a modifying agent consisting only of approximately .2 parts of tetrahydronaphthalene into approximately 100 parts of gasoline. 25 4'. A composition for the prevention and removal of carbon deposits in internal combustion engines consisting of gasoline and zlpplroximately .2 of 1% oftetrahydronaphp a cue.

- an In witness whereofl have hereunto set my hand-this 16th day of December1925.

MARCUS J; EESSLEB, 

